Ariel Winter is an American child actress. She is best known for portraying Ellie Layton in the 2008 film One Missed Call and for the character Alex Dunphy on Modern Family. Winter also had a recurring role in the tv series ER as Lucy Moore, the daughter of Hedy Burress's character, Joanie. She also voices Gretchen in Phineas and Ferb. Click to read more